<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <title>Release 4.0: txn_XXX</title>
    <link rel="stylesheet" href="gettingStarted.css" type="text/css" />
    <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
    <link rel="start" href="index.html" title="Berkeley DB Programmer's Reference Guide" />
    <link rel="up" href="upgrade_4_0_toc.html" title="Chapter 37. Upgrading Berkeley DB 3.3 applications to Berkeley DB 4.0" />
    <link rel="prev" href="upgrade_4_0_mp.html" title="Release 4.0: memp_XXX" />
    <link rel="next" href="upgrade_4_0_env.html" title="Release 4.0: db_env_set_XXX" />
  </head>
  <body>
    <div class="navheader">
      <table width="100%" summary="Navigation header">
        <tr>
          <th colspan="3" align="center">Release 4.0: txn_XXX</th>
        </tr>
        <tr>
          <td width="20%" align="left"><a accesskey="p" href="upgrade_4_0_mp.html">Prev</a> </td>
          <th width="60%" align="center">Chapter 37. Upgrading Berkeley DB 3.3 applications to Berkeley DB 4.0</th>
          <td width="20%" align="right"> <a accesskey="n" href="upgrade_4_0_env.html">Next</a></td>
        </tr>
      </table>
      <hr />
    </div>
    <div class="sect1" lang="en" xml:lang="en">
      <div class="titlepage">
        <div>
          <div>
            <h2 class="title" style="clear: both"><a id="upgrade_4_0_txn"></a>Release 4.0: txn_XXX</h2>
          </div>
        </div>
      </div>
      <p>The C API for the Berkeley DB Transaction subsystem was reworked in the 4.0
release as follows:</p>
      <div class="informaltable">
        <table border="1" width="80%">
          <colgroup>
            <col />
            <col />
          </colgroup>
          <thead>
            <tr>
              <th>Historic functional interface</th>
              <th>Berkeley DB 4.X method</th>
            </tr>
          </thead>
          <tbody>
            <tr>
              <td>txn_abort</td>
              <td>
                <a href="../api_reference/C/txnabort.html" class="olink">DB_TXN-&gt;abort()</a>
              </td>
            </tr>
            <tr>
              <td>txn_begin</td>
              <td>
                <a href="../api_reference/C/txnbegin.html" class="olink">DB_ENV-&gt;txn_begin()</a>
              </td>
            </tr>
            <tr>
              <td>txn_checkpoint</td>
              <td>
                <a href="../api_reference/C/txncheckpoint.html" class="olink">DB_ENV-&gt;txn_checkpoint()</a>
              </td>
            </tr>
            <tr>
              <td>txn_commit</td>
              <td>
                <a href="../api_reference/C/txncommit.html" class="olink">DB_TXN-&gt;commit()</a>
              </td>
            </tr>
            <tr>
              <td>txn_discard</td>
              <td>
                <a href="../api_reference/C/txndiscard.html" class="olink">DB_TXN-&gt;discard()</a>
              </td>
            </tr>
            <tr>
              <td>txn_id</td>
              <td>
                <a href="../api_reference/C/txnid.html" class="olink">DB_TXN-&gt;id()</a>
              </td>
            </tr>
            <tr>
              <td>txn_prepare</td>
              <td>
                <a href="../api_reference/C/txnprepare.html" class="olink">DB_TXN-&gt;prepare()</a>
              </td>
            </tr>
            <tr>
              <td>txn_recover</td>
              <td>
                <a href="../api_reference/C/txnrecover.html" class="olink">DB_TXN-&gt;recover()</a>
              </td>
            </tr>
            <tr>
              <td>txn_stat</td>
              <td>
                <a href="../api_reference/C/txnstat.html" class="olink">DB_TXN-&gt;stat()</a>
              </td>
            </tr>
          </tbody>
        </table>
      </div>
      <p>Applications calling any of these functions should update their calls
to use the enclosing <a href="../api_reference/C/env.html" class="olink">DB_ENV class</a> handle's method
(easily done as the first argument to the existing call is the correct
handle to use).</p>
      <p>As a special case, since applications might potentially have many calls
to the txn_abort, txn_begin and txn_commit functions, those functions
continue to work unchanged in the Berkeley DB 4.0 release.</p>
      <p>In addition, the <a href="../api_reference/C/txnstat.html" class="olink">DB_TXN-&gt;stat()</a> call has been changed in the 4.0
release to take a flags argument.  To leave their historic behavior
unchanged, applications should add a final argument of 0 to any calls
made to <a href="../api_reference/C/txnstat.html" class="olink">DB_TXN-&gt;stat()</a>.</p>
    </div>
    <div class="navfooter">
      <hr />
      <table width="100%" summary="Navigation footer">
        <tr>
          <td width="40%" align="left"><a accesskey="p" href="upgrade_4_0_mp.html">Prev</a> </td>
          <td width="20%" align="center">
            <a accesskey="u" href="upgrade_4_0_toc.html">Up</a>
          </td>
          <td width="40%" align="right"> <a accesskey="n" href="upgrade_4_0_env.html">Next</a></td>
        </tr>
        <tr>
          <td width="40%" align="left" valign="top">Release 4.0: memp_XXX </td>
          <td width="20%" align="center">
            <a accesskey="h" href="index.html">Home</a>
          </td>
          <td width="40%" align="right" valign="top"> Release 4.0: db_env_set_XXX</td>
        </tr>
      </table>
    </div>
  </body>
</html>
